package com.example.networktest;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class ContentHandler extends DefaultHandler {

    private String nodeName;
    private StringBuilder id;
    private StringBuilder name;
    private StringBuilder version;

    @Override
    public void startDocument()throws SAXException{
        id = new StringBuilder();
        name = new StringBuilder();
        version = new StringBuilder();
    }

    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes)throws SAXException{
        //记录当前节点
        nodeName = localName;
    }

    @Override
    public void characters(char[] ch,int start,int length) throws SAXException{
        //根据当前的节点名判断将内容添加到哪一个stringbuilder对象中
        if ("id".equals(nodeName)){
            id.append(ch,start,length);
        }else if ("name".equals(nodeName)){
            name.append(ch,start,length);
        }else if("version".equals(nodeName)){
            version.append(ch,start,length);
        }
    }

    @Override
    public void endElement(String uri,String localName,String qName)throws SAXException{
        if("app".equals(localName)){
            Log.d("ContentHandler","id is" + id.toString().trim());
            Log.d("ContentHandler","name is" + name.toString().trim());
            Log.d("ContentHandler","version is" + version.toString().trim());
            //最后将StringBuilder清空掉
            id.setLength(0);
            name.setLength(0);
            version.setLength(0);
        }
    }

    @Override
    public void endDocument() throws SAXException{
        super.endDocument();
    }
}